Rooter's Cleaning Services provided data concerning the costs incurred to clean hotel rooms for which hotel customers pay $$150$ per night. Data for the past $7$ months are as follows:

$\backslash$table$[[,$January,February,March,April,May,June$],[\backslash$table$[[$Number of$],[$rooms$],[$cleaned$]],250,160,200,150,300,170],[\backslash$table$[[$Cleaning$],[$cost$]],$$$6,450,$$$4,060,$$$5,100,$$$4,100,$$$6,880,$$$4,200$